#include<iostream>
#include<algorithm>
void solve();
signed main(){
    int t;
    std::cin>>t;
    while(t--)solve();
}
void solve(){
    int64_t a,b,c;
    std::cin>>a>>b>>c;
    if(std::max({a,b,c})==b||std::min({a,b,c})==b)std::cout<< 0 <<std::endl;
    else std::cout<< std::min(std::max(a,c)+1-b,b-std::min(a,c)+1) <<std::endl;
}